US5219221A - Lamp retainer of light source device for endoscope - Google Patents

Lamp retainer of light source device for endoscope Download PDF

Info

Publication number
US5219221A
US5219221A US07/642,528 US64252891A US5219221A US 5219221 A US5219221 A US 5219221A US 64252891 A US64252891 A US 64252891A US 5219221 A US5219221 A US 5219221A
Authority
US
United States
Prior art keywords
light source
electrode
electrically conductive
lamp
heat sink
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/642,528
Inventor
Shoichi Yamaka
Junji Usami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Assigned to ASAHI KOGAKU KOGYO KABUSHIKI KAISHA reassignment ASAHI KOGAKU KOGYO KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: USAMI, JUNJI, YAMAKA, SHOICHI
Application granted granted Critical
Publication of US5219221A publication Critical patent/US5219221A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0661—Endoscope light sources
    • A61B1/0669—Endoscope light sources at proximal end of an endoscope
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/006—Fastening of light sources or lamp holders of point-like light sources, e.g. incandescent or halogen lamps, with screw-threaded or bayonet base
    • F21V19/0065—Fastening of light sources or lamp holders of point-like light sources, e.g. incandescent or halogen lamps, with screw-threaded or bayonet base at least one conductive element acting as a support means, e.g. spring-mounted contact plate in a bayonet base
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/71—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/75—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals

Definitions

  • the present invention relates to a lamp retainer of a light source device that is used to supply illuminating light to an endoscope. More particularly, the present invention relates to a lamp retainer for retaining a light source lamp, which has a first electrode on the rear end portion and a second electrode on the side thereof.
  • FIGS. 7 and 8 show a lamp retainer of a light source device for an endoscope according to the prior art.
  • Reference numeral 51 denotes a light source lamp.
  • the light source lamp 51 has a light emitting window 52, a first electrode 53 with a stepped structure comprising a small-diameter portion 53a and a large-diameter portion 53b, and a second electrode 54 that is provided on the side of an end portion of the lamp 51, which is closer to the window 52.
  • a pair of first and second heat sinks 61 and 62 secure the light source lamp 51 in such a manner that the two heat sinks 61 and 62 are in contact with the first and second electrodes 53 and 54, respectively.
  • the heat sinks 61 and 62 serve as both electrically conducting paths and heat dissipaters for the light source lamp 51.
  • a fixing screw 63 secures the light source lamp 51 to the first heat sink 61, such that the first electrode 53 and the first heat sink 61 are electrically connected to each other.
  • a clamping screw 64 deforms the second heat sink 62 in a direction such that a slit 65, that is formed in the second heat sink 62, is narrowed. By tightening the screw 64, the second electrode 54 of the light source lamp 51 is clamped by the second heat sink 62, and thus, the light source lamp 51 is secured to the second heat sink 62.
  • the clamping screw 64 is tightened too strong, the light source lamp 51 may be broken, and the clamping screw 64 must therefore be tightened with care, so as not to be overtightened.
  • the clamping screw 64 is not sufficiently tightened, a contact failure occurs between the second heat sink 62 and the second electrode 54. This results in the light source lamp 51 failing to be turned on.
  • An object of the present invention is to provide a lamp retainer of a light source device, which enables a light source lamp to be readily attached to heat sinks with reliable electrical connections therebetween.
  • a lamp retainer of a light source device which retains a light source lamp that has two electrodes. At least one of the electrodes is on the side comprising an electrically conductive heat sink and an electrically conductive electrode press device that is attached to the heat sink.
  • the press device is biased to resiliently press against the electrode from the side, so that the electrode and the heat sink are electrically connected through the press device.
  • FIG. 1 is a sectional side view of a light source device for an endoscope according to a first embodiment of the present invention
  • FIG. 2 is a sectional side view of a lamp retainer according to the first embodiment of the present invention
  • FIG. 3 is a rear view of a second heat sink in the first embodiment of the present invention.
  • FIG. 4 is a fragmentary plan view of the lamp retainer according to the first embodiment of the present invention.
  • FIG. 5 is a rear view of a second heat sink in a second embodiment of the present invention.
  • FIG. 6 is a rear view of a second heat sink in a third embodiment of the present invention.
  • FIG. 7 is a sectional side view of a lamp retainer according to the prior art.
  • FIG. 8 is a sectional front view of the prior art shown in FIG. 7.
  • FIG. 1 shows a part of a light source device 100 for an endoscope.
  • the light source device 100 has a floor plate 101, to which a frame 102 is secured.
  • An electrical insulating base 103 is secured to the upper end of the frame 102, parallel to the floor plate 101.
  • a pair of first and second heat sinks 9 and 10 are suspended from the base 103.
  • the heat sinks 9 and 10 are provided with a large number of cooling fins 9a and 10a, respectively.
  • a xenon lamp 1 is retained by the two heat sinks 9 and 10.
  • Both the heat sinks 9 and 10 are formed from a metallic material having good electrical and thermal conductivities.
  • a connector socket 105 is formed in front of a light emitting window 2 of the lamp 1, for externally inserting a light guide connector 200 of the endoscope. Illuminating light, that is emitted from the xenon lamp 1, is condensed onto the projecting end face of the light guide connector 200 by a condenser lens 106. The condensed light is transmitted through a light guide fiber bundle, and emitted to the outside, from the distal end of an insert part (not shown) of the endoscope. This illuminates the observation field of the endoscope.
  • FIG. 2 shows the heat sinks 9 and 10.
  • the window 2, for emitting illuminating light forwardly, is formed in the front end face of the cylindrical xenon lamp 1.
  • a first electrode 3 is attached to the rear end portion of the lamp 1.
  • the first electrode 3 has a stepped structure comprising a small-diameter portion 3a which is closer to the outer end of the electrode 3 and a large-diameter portion 3b which is contiguous with the inner end of the small-diameter portion 3a.
  • An annular second electrode 6 is provided on the outer periphery of the front end portion of the xenon lamp 1.
  • the electrode 6 has substantially the same outer diameter as that of the large-diameter portion 3b.
  • the first and second heat sinks 9 and 10 which are spaced apart from each other, are suspended from the underside of the base 103 through respective sub-heat sinks 9s and 10s, which are shown in FIG. 1.
  • Reference numerals 4 and 5 denote mounting bolts, whose distal end portions 4a and 5a are screwed into the sub-heat sinks 9s and 10s, respectively.
  • the inner end of the socket 11 is provided with a stopper 12, that abuts against the rear end face of the small-diameter portion 3a.
  • the small-diameter portion 3a of the first electrode 3 is tightly fitted into the socket 11, with the rear end face of the small-diameter portion 3a pressed against the stopper 12. This enables the first electrode 3 to be set in position.
  • a screw 13 is screwed into the rear end portion of the first electrode 3 of the xenon lamp 1 through a bore that is formed in the first heat sink 9.
  • the first heat sink 9 and the first electrode 3 are electrically connected to each other.
  • the second heat sink 10 which is forward of the first heat sink 9, is formed with a guide bore 14, which can loosely receive the second electrode 6 of the xenon lamp 1, so that it is removable.
  • a positioning member 15 is attached to the front face of the second heat sink 10 by means of screws (not shown). This enables the positioning member 15 to fit loosely to the front end portion of the xenon lamp 1, allowing it to be positioned.
  • Each press member 20 is cut circularly so as to come into close contact with the second electrode 6 of the xenon lamp 1.
  • Reference numeral 20a denotes the circular cut portions.
  • a tension coil spring 22 is stretched between the two press members 20 to bias them toward each other, so as to clamp the xenon lamp 1 from both sides. Accordingly, the xenon lamp 1 is secured to the second heat sink 10 with the second electrode 6 being resiliently pressed from both sides by the press members 20.
  • a chamfer 20b is formed along the edge of the cut portion 20a of each press member 20. Accordingly, when the second electrode 6 of the xenon lamp 1 is axially inserted into the area defined between the cut portions 20a, as shown in FIG. 4, the lamp 1 is guided by the chamfers 20b, while the two press members 20 open, so that the second electrode 6 can be inserted with ease.
  • the xenon lamp 1 is secured to the second heat sink 10 by the press members 20.
  • an electrical connection is reliably made between the second electrode 6 and the second heat sink 10 through the press members 20.
  • heat that is generated from the second electrode 6 is conducted to the second heat sink 10 through the press members 20 for dissipation.
  • FIG. 5 shows a second embodiment of the present invention, which employs only one press member 30.
  • FIG. 6 shows a third embodiment of the present invention, in which a press member 40 itself is formed from a resilient metal.
  • one end of the tension coil spring 22 is secured to the second heat sink 10.
  • stoppers 41 are provided on the back side of the second heat sink 10 to elastically deform the press member 40.
  • At least one press member that is attached to the second heat sink resiliently presses the second electrode that is formed on the side of the light source lamp, thereby securing the light source lamp to the second heat sink. Accordingly, the light source lamp can be secured, with the second heat sink and the second electrode electrically connected together reliably, without any destructive force to the lamp. Thus, it is possible to eliminate the problems of breakage and contact failure of the light source lamp.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Optics & Photonics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Geometry (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Endoscopes (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

A lamp retainer of a light source device, which retains a light source lamp that has two electrodes, at least one of them being on the side thereof. The lamp retainer comprises an electrically conductive heat sink, and an electrically conductive electrode press device that is attached to the heat sink. The press device is biased to resiliently press the electrode from the side thereof, so that the electrode and the heat sink are electrically connected through the press device.

Description

BACKGROUND OF THE INVENTION
The present disclosure relates to subject matter contained in Japanese Patent application No. 2-18681 (filed on Jan. 29, 1990), which is expressly incorporated herein, by reference, in its entirety.
FIELD OF THE INVENTION
The present invention relates to a lamp retainer of a light source device that is used to supply illuminating light to an endoscope. More particularly, the present invention relates to a lamp retainer for retaining a light source lamp, which has a first electrode on the rear end portion and a second electrode on the side thereof.
DESCRIPTION OF THE PRIOR ART
FIGS. 7 and 8 show a lamp retainer of a light source device for an endoscope according to the prior art. Reference numeral 51 denotes a light source lamp. The light source lamp 51 has a light emitting window 52, a first electrode 53 with a stepped structure comprising a small-diameter portion 53a and a large-diameter portion 53b, and a second electrode 54 that is provided on the side of an end portion of the lamp 51, which is closer to the window 52.
A pair of first and second heat sinks 61 and 62 secure the light source lamp 51 in such a manner that the two heat sinks 61 and 62 are in contact with the first and second electrodes 53 and 54, respectively. The heat sinks 61 and 62 serve as both electrically conducting paths and heat dissipaters for the light source lamp 51.
A fixing screw 63 secures the light source lamp 51 to the first heat sink 61, such that the first electrode 53 and the first heat sink 61 are electrically connected to each other. A clamping screw 64 deforms the second heat sink 62 in a direction such that a slit 65, that is formed in the second heat sink 62, is narrowed. By tightening the screw 64, the second electrode 54 of the light source lamp 51 is clamped by the second heat sink 62, and thus, the light source lamp 51 is secured to the second heat sink 62.
However, if the clamping screw 64 is tightened too strong, the light source lamp 51 may be broken, and the clamping screw 64 must therefore be tightened with care, so as not to be overtightened. On the other hand, if the clamping screw 64 is not sufficiently tightened, a contact failure occurs between the second heat sink 62 and the second electrode 54. This results in the light source lamp 51 failing to be turned on.
Accordingly, the operation of attaching the light source lamp 51 to the heat sinks 61 and 62 is extremely delicate and difficult. The above-described problems, due to excessive or insufficient tightening of the clamping screw 64, have occurred frequently.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a lamp retainer of a light source device, which enables a light source lamp to be readily attached to heat sinks with reliable electrical connections therebetween.
Other objects and advantages of the present invention will become apparent from the following detailed description of illustrated embodiments of the invention.
According to the present invention, there is provided a lamp retainer of a light source device, which retains a light source lamp that has two electrodes. At least one of the electrodes is on the side comprising an electrically conductive heat sink and an electrically conductive electrode press device that is attached to the heat sink. The press device is biased to resiliently press against the electrode from the side, so that the electrode and the heat sink are electrically connected through the press device.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention may be more fully understood from the description of preferred embodiments of the invention set forth below, together with the accompanying drawings, in which:
FIG. 1 is a sectional side view of a light source device for an endoscope according to a first embodiment of the present invention;
FIG. 2 is a sectional side view of a lamp retainer according to the first embodiment of the present invention;
FIG. 3 is a rear view of a second heat sink in the first embodiment of the present invention;
FIG. 4 is a fragmentary plan view of the lamp retainer according to the first embodiment of the present invention;
FIG. 5 is a rear view of a second heat sink in a second embodiment of the present invention;
FIG. 6 is a rear view of a second heat sink in a third embodiment of the present invention;
FIG. 7 is a sectional side view of a lamp retainer according to the prior art; and
FIG. 8 is a sectional front view of the prior art shown in FIG. 7.
DETAILED DESCRIPTION OF THE EMBODIMENTS
Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a part of a light source device 100 for an endoscope. The light source device 100 has a floor plate 101, to which a frame 102 is secured. An electrical insulating base 103 is secured to the upper end of the frame 102, parallel to the floor plate 101.
A pair of first and second heat sinks 9 and 10 are suspended from the base 103. The heat sinks 9 and 10 are provided with a large number of cooling fins 9a and 10a, respectively. A xenon lamp 1 is retained by the two heat sinks 9 and 10. Both the heat sinks 9 and 10 are formed from a metallic material having good electrical and thermal conductivities.
A connector socket 105 is formed in front of a light emitting window 2 of the lamp 1, for externally inserting a light guide connector 200 of the endoscope. Illuminating light, that is emitted from the xenon lamp 1, is condensed onto the projecting end face of the light guide connector 200 by a condenser lens 106. The condensed light is transmitted through a light guide fiber bundle, and emitted to the outside, from the distal end of an insert part (not shown) of the endoscope. This illuminates the observation field of the endoscope.
FIG. 2 shows the heat sinks 9 and 10.
The window 2, for emitting illuminating light forwardly, is formed in the front end face of the cylindrical xenon lamp 1. A first electrode 3 is attached to the rear end portion of the lamp 1. The first electrode 3 has a stepped structure comprising a small-diameter portion 3a which is closer to the outer end of the electrode 3 and a large-diameter portion 3b which is contiguous with the inner end of the small-diameter portion 3a.
An annular second electrode 6 is provided on the outer periphery of the front end portion of the xenon lamp 1. The electrode 6 has substantially the same outer diameter as that of the large-diameter portion 3b.
The first and second heat sinks 9 and 10, which are spaced apart from each other, are suspended from the underside of the base 103 through respective sub-heat sinks 9s and 10s, which are shown in FIG. 1. Reference numerals 4 and 5 denote mounting bolts, whose distal end portions 4a and 5a are screwed into the sub-heat sinks 9s and 10s, respectively.
The first heat sink 9, which is closer to the rear end of the light source device, is provided with a socket 11 for insertion of the small-diameter portion 3a of the first electrode 3. The inner end of the socket 11 is provided with a stopper 12, that abuts against the rear end face of the small-diameter portion 3a.
Accordingly, the small-diameter portion 3a of the first electrode 3 is tightly fitted into the socket 11, with the rear end face of the small-diameter portion 3a pressed against the stopper 12. This enables the first electrode 3 to be set in position.
Then, a screw 13 is screwed into the rear end portion of the first electrode 3 of the xenon lamp 1 through a bore that is formed in the first heat sink 9. Thus enabling the xenon lamp 1 to be positioned and secured to the first heat sink 9. In addition, the first heat sink 9 and the first electrode 3 are electrically connected to each other.
In the meantime, the second heat sink 10, which is forward of the first heat sink 9, is formed with a guide bore 14, which can loosely receive the second electrode 6 of the xenon lamp 1, so that it is removable. A positioning member 15 is attached to the front face of the second heat sink 10 by means of screws (not shown). This enables the positioning member 15 to fit loosely to the front end portion of the xenon lamp 1, allowing it to be positioned.
As shown in FIG. 3, a pair of right and left press members 20, which are formed from electrically conductive metal plates, are attached to the back side of the second heat sink 10, in such a manner as to be pivotable about respective pivot shafts 21. Each press member 20 is cut circularly so as to come into close contact with the second electrode 6 of the xenon lamp 1. Reference numeral 20a denotes the circular cut portions.
In addition, a tension coil spring 22 is stretched between the two press members 20 to bias them toward each other, so as to clamp the xenon lamp 1 from both sides. Accordingly, the xenon lamp 1 is secured to the second heat sink 10 with the second electrode 6 being resiliently pressed from both sides by the press members 20.
It should be noted that a chamfer 20b is formed along the edge of the cut portion 20a of each press member 20. Accordingly, when the second electrode 6 of the xenon lamp 1 is axially inserted into the area defined between the cut portions 20a, as shown in FIG. 4, the lamp 1 is guided by the chamfers 20b, while the two press members 20 open, so that the second electrode 6 can be inserted with ease.
In this way, the xenon lamp 1 is secured to the second heat sink 10 by the press members 20. In this state, an electrical connection is reliably made between the second electrode 6 and the second heat sink 10 through the press members 20. In addition, heat that is generated from the second electrode 6 is conducted to the second heat sink 10 through the press members 20 for dissipation.
FIG. 5 shows a second embodiment of the present invention, which employs only one press member 30. FIG. 6 shows a third embodiment of the present invention, in which a press member 40 itself is formed from a resilient metal.
In FIG. 5, one end of the tension coil spring 22 is secured to the second heat sink 10. In FIG. 6, stoppers 41 are provided on the back side of the second heat sink 10 to elastically deform the press member 40.
According to the present invention, at least one press member, that is attached to the second heat sink resiliently presses the second electrode that is formed on the side of the light source lamp, thereby securing the light source lamp to the second heat sink. Accordingly, the light source lamp can be secured, with the second heat sink and the second electrode electrically connected together reliably, without any destructive force to the lamp. Thus, it is possible to eliminate the problems of breakage and contact failure of the light source lamp.
While the invention has been described by reference to specific embodiments chosen for purposes of illustration, it should be apparent that numerous modifications could be made thereto by those skilled in the art without departing from the basic concept and scope of the invention.

Claims (16)

We claim:
1. A lamp retainer of a light source device for retaining a light source lamp having at least one side, the light source lamp further having two electrodes, at least one of said electrodes having a side portion, said lamp retainer comprising:
an electrically conductive heat sink; and
an electrically conductive electrode press means, said electrically conductive electrode press means comprising a portion which is electrically connected to said electrically conductive heat sink; a portion which is electrically connected to said at least one of said electrodes and is movable with respect to said electrically conductive heat sink; and a spring portion which biases said portion which is electrically connected to said at least one of said electrodes, in order to press said at least one of said electrodes, said electrically conductive electrode press means being biased to resiliently press said at least one of said electrodes from said side portion of said at least one of said electrodes, so that said at least one of said electrodes and said electrically conductive heat sink are electrically connected through said electrically conductive electrode press means.
2. A lamp retainer of a light source device for retaining a light source lamp according to claim 1, wherein said light source lamp has at least one side, and said at least one of said electrodes which is pressed by said electrically conductive electrode press means is on said at least one side of said light source lamp.
3. A lamp retainer of a light source device for retaining a light source lamp according to claim 1, wherein said at least one electrode is integrally provided on an outer periphery of at least one said side of said light source lamp.
4. A lamp retainer of a light source device for retaining a light source lamp according to claim 1, wherein said portion which is electrically connected to said at least one of said electrodes is movable against said electrically conductive heat sink.
5. A lamp retainer of a light source device for retaining a light source lamp that has a rear end portion and at least one side, a first electrode on said rear end portion and a second electrode having at least one side on said at least one side of said light source lamp, said lamp retainer comprising:
a first electrically conductive heat sink that secures said rear end portion of said light source lamp, and that is electrically connected to said first electrode;
a second electrically conductive heat sink that is spaced apart from said first electrically conductive heat sink; and
electrically conductive electrode press means that is attached to said second electrically conductive heat sink, said electrically conductive electrode press means comprising a portion which is electrically connected to said second electrically conductive heat sink; a portion which is electrically connected to said at least one side of said second electrode and is movable with respect to said second electrically conductive heat sink; and a spring portion which biases said portion which is electrically connected to said second electrode, in order to press said second electrode,from said at least one side of said second electrode, so that said second electrode and said second electrically conductive heat sink are electrically connected through said electrically conductive electrode press means.
6. A lamp retainer of a light source device for retaining a light source lamp according to claim 5, wherein said second electrode is integrally provided on an outer periphery of at least one said side of said light source lamp.
7. A lamp retainer of a light source device for retaining a light source lamp according to claim 5, wherein said portion which is electrically connected to at least one said side of said second electrode is movable against said second electrically conductive heat sink.
8. A lamp retainer of a light source device for an endoscope, which retains a light source lamp having a rear end portion and at least one side, a first electrode on said rear end portion and a second electrode having at least one side on said side at least one of said light source lamp, comprising:
a first electrically conductive heat sink that secures said rear end portion of said light source lamp, and that is electrically connected to said first electrode;
a second electrically conductive heat sink that is spaced apart from said first electrically conductive heat sink; and
electrically conductive electrode press means that is attached to said second electrically conductive heat sink, said electrically conductive electrode press means comprising a portion which is electrically connected to said second electrically conductive heat sink; a portion which is electrically connected to said at least one side of said second electrode and is movable with respect to said second electrically conductive heat sink, and a spring portion which biases said portion which is electrically connected to said second electrode, in order to press said second electrode, from said at least one side of said second electrode, so that said second electrode and said second electrically conductive heat sink are electrically connected through said electrically conductive press means.
9. A lamp retainer of a light source device for an endoscope according to claim 8, wherein said rear end portion of said light source lamp is secured to said first electrically conductive heat sink by a screw.
10. A lamp retainer of a light source device for an endoscope according to claim 3, wherein said second electrode is inserted into a bore that is formed in said second electrically conducive heat sink.
11. A lamp retainer of a light source device for retaining a light source lamp according to claim 10, wherein said bore is chamfered.
12. A lamp retainer of a light source device for an endoscope according to claim 3, wherein said electrically conductive electrode press means are provided at both sides of said light source lamp and biased to clamp it from both sides.
13. A lamp retainer of a light source device for an endoscope according to claim 3, wherein said electrically conductive electrode press means is formed from a resilient metal.
14. A lamp retainer of a light source device for retaining a light source lamp according to claim 8, wherein said second electrode is integrally provided on an outer periphery of least one said side of said light source lamp.
15. A lamp retainer of a light source device for retaining a light source lamp according to claim 8, wherein said electrically conductive electrode press means are provided at only one side of said second electrode and biased to clamp said second electrode from one side.
16. A lamp retainer of a light source device for retaining a light source lamp according to claim 8, wherein said portion which is electrically connected to at least one said side of said second electrode is movable against said second electrically conductive heat sink.
US07/642,528 1990-01-29 1991-01-17 Lamp retainer of light source device for endoscope Expired - Lifetime US5219221A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2-18681 1990-01-29
JP2018681A JP2796868B2 (en) 1990-01-29 1990-01-29 Lamp holding device of light source device for endoscope

Publications (1)

Publication Number Publication Date
US5219221A true US5219221A (en) 1993-06-15

Family

ID=11978352

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/642,528 Expired - Lifetime US5219221A (en) 1990-01-29 1991-01-17 Lamp retainer of light source device for endoscope

Country Status (3)

Country Link
US (1) US5219221A (en)
JP (1) JP2796868B2 (en)
DE (1) DE4102212C2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5329436A (en) * 1993-10-04 1994-07-12 David Chiu Removable heat sink for xenon arc lamp packages
US5335154A (en) * 1991-09-12 1994-08-02 Olympus Optical Co., Ltd. Optical axis adjustment mechanism for a light source
US5906576A (en) * 1998-03-27 1999-05-25 Mercury Enterprises, Inc. Light coupling assembly for use in a medical instrument, system and method
US5968397A (en) * 1997-06-06 1999-10-19 Amana Company, L.P. Apparatus for cooling a quartz halogen lamp with heat conducting convector secured to the lamp terminal or socket
US20070131669A1 (en) * 2005-12-14 2007-06-14 Lg Electronics Inc. Electric oven
US20080084700A1 (en) * 2006-09-18 2008-04-10 Led Lighting Fixtures, Inc. Lighting devices, lighting assemblies, fixtures and method of using same
US20100246178A1 (en) * 2009-03-31 2010-09-30 Heatron, Inc. Thermal Management For LED Lighting

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1758775A (en) * 1926-03-27 1930-05-13 Gen Electric Heat-dissipating device
US2662220A (en) * 1950-05-06 1953-12-08 Honeywell Regulator Co Clamping device for electronic discharge devices
US3020451A (en) * 1957-11-25 1962-02-06 Int Electronic Res Corp Right angle heat dissipating tube shield
US3541492A (en) * 1968-08-05 1970-11-17 Benjamin Electric Ltd The Heat sinks for electric lamps
JPS57185303A (en) * 1981-04-13 1982-11-15 Chemplex Co Polymerization catalyst and method
JPS5825582A (en) * 1981-06-03 1983-02-15 エスパダ・アンスタルト・ユニヴア−サル・マ−ケテイング Manufacture of plasma igniter for internal combustion engine
JPS5825583A (en) * 1981-08-07 1983-02-15 Nissan Motor Co Ltd Apparatus for detecting failed cylinder
JPS60148614A (en) * 1984-01-11 1985-08-05 Ishikawajima Harima Heavy Ind Co Ltd Control method of meandering
JPS60148613A (en) * 1984-01-10 1985-08-05 Ishikawajima Harima Heavy Ind Co Ltd Control device of meandering
JPS60208005A (en) * 1984-03-31 1985-10-19 オリンパス光学工業株式会社 Light source
US4572164A (en) * 1983-08-17 1986-02-25 Fuji Photo Optical Co., Ltd. Light source device for endoscope
JPS6320023A (en) * 1986-07-10 1988-01-27 ヴアルタ−・ウント・コンパニ−・アクチエンゲゼルシヤフト Method of removing nitrogen oxide from waste gas
JPS63191311A (en) * 1987-02-04 1988-08-08 Hitachi Ltd Head crush preventing method
US4887154A (en) * 1988-06-01 1989-12-12 Welch Allyn, Inc. Lamp assembly and receptacle
JPH0280109A (en) * 1988-09-13 1990-03-20 Kubota Ltd Conjugated roll

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1399978A (en) * 1973-06-26 1975-07-02 Kicon Ag Lighting fixture and sub-ceiling structure
DE2501863A1 (en) * 1975-01-17 1976-07-22 Patra Patent Treuhand Studio light built-in unit for film or television purposes - has halogen metal vapour bulb with heat dissipating leads and insulating plates and sheaths
DE2744340C3 (en) * 1977-10-01 1980-07-03 Licentia Patent-Verwaltungs-Gmbh, 66000 Frankfurt Luminaire for high pressure lamps
JPS63191311U (en) * 1987-05-27 1988-12-09

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1758775A (en) * 1926-03-27 1930-05-13 Gen Electric Heat-dissipating device
US2662220A (en) * 1950-05-06 1953-12-08 Honeywell Regulator Co Clamping device for electronic discharge devices
US3020451A (en) * 1957-11-25 1962-02-06 Int Electronic Res Corp Right angle heat dissipating tube shield
US3541492A (en) * 1968-08-05 1970-11-17 Benjamin Electric Ltd The Heat sinks for electric lamps
JPS57185303A (en) * 1981-04-13 1982-11-15 Chemplex Co Polymerization catalyst and method
JPS5825582A (en) * 1981-06-03 1983-02-15 エスパダ・アンスタルト・ユニヴア−サル・マ−ケテイング Manufacture of plasma igniter for internal combustion engine
JPS5825583A (en) * 1981-08-07 1983-02-15 Nissan Motor Co Ltd Apparatus for detecting failed cylinder
US4572164A (en) * 1983-08-17 1986-02-25 Fuji Photo Optical Co., Ltd. Light source device for endoscope
JPS60148613A (en) * 1984-01-10 1985-08-05 Ishikawajima Harima Heavy Ind Co Ltd Control device of meandering
JPS60148614A (en) * 1984-01-11 1985-08-05 Ishikawajima Harima Heavy Ind Co Ltd Control method of meandering
JPS60208005A (en) * 1984-03-31 1985-10-19 オリンパス光学工業株式会社 Light source
JPS6320023A (en) * 1986-07-10 1988-01-27 ヴアルタ−・ウント・コンパニ−・アクチエンゲゼルシヤフト Method of removing nitrogen oxide from waste gas
JPS63191311A (en) * 1987-02-04 1988-08-08 Hitachi Ltd Head crush preventing method
US4887154A (en) * 1988-06-01 1989-12-12 Welch Allyn, Inc. Lamp assembly and receptacle
JPH0280109A (en) * 1988-09-13 1990-03-20 Kubota Ltd Conjugated roll

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5335154A (en) * 1991-09-12 1994-08-02 Olympus Optical Co., Ltd. Optical axis adjustment mechanism for a light source
US5329436A (en) * 1993-10-04 1994-07-12 David Chiu Removable heat sink for xenon arc lamp packages
US5968397A (en) * 1997-06-06 1999-10-19 Amana Company, L.P. Apparatus for cooling a quartz halogen lamp with heat conducting convector secured to the lamp terminal or socket
US5906576A (en) * 1998-03-27 1999-05-25 Mercury Enterprises, Inc. Light coupling assembly for use in a medical instrument, system and method
US20070131669A1 (en) * 2005-12-14 2007-06-14 Lg Electronics Inc. Electric oven
US7348521B2 (en) * 2005-12-14 2008-03-25 Lg Electronics Inc. Electric oven
US20080084700A1 (en) * 2006-09-18 2008-04-10 Led Lighting Fixtures, Inc. Lighting devices, lighting assemblies, fixtures and method of using same
US7959329B2 (en) * 2006-09-18 2011-06-14 Cree, Inc. Lighting devices, lighting assemblies, fixtures and method of using same
US20100246178A1 (en) * 2009-03-31 2010-09-30 Heatron, Inc. Thermal Management For LED Lighting
US7997763B2 (en) * 2009-03-31 2011-08-16 Heatron, Inc. Multi-heat sink LED device

Also Published As

Publication number Publication date
JP2796868B2 (en) 1998-09-10
DE4102212C2 (en) 1996-05-02
DE4102212A1 (en) 1991-08-01
JPH03222931A (en) 1991-10-01

Similar Documents

Publication Publication Date Title
US8128557B2 (en) Endoscope with heat dissipating handle
US7806709B2 (en) Lamp socket and display device having the same
US5219221A (en) Lamp retainer of light source device for endoscope
US6144092A (en) Electronic power device heatsink clamping system
JP2007311482A (en) Fixing structure for light-emitting diode
JP2001043715A (en) Planar lighting system
WO2005117149A1 (en) Fixing device and fixing structure for light emitting diode
KR20060043021A (en) Apparatus for throwing a light
US4766653A (en) Method and tool for assembling power semiconductor and heat sink
US4605280A (en) Universal light cable adapter for light source
JP2002353385A (en) Servo drive device
CN210660876U (en) Connecting piece and lighting equipment
JPH08181474A (en) Tightening apparatus for power constituting part and radiator,and method for mounting such apparatus on printed circuit board
JP2007220540A (en) Terminal block and lighting device
JP3264203B2 (en) Electronic equipment
JP3377577B2 (en) Light source device
JP2004146277A (en) Lamp socket and luminaire using it
JP7503337B2 (en) Replaceable light emitting device for light emitting module
JPH0148613B2 (en)
JPH0260376A (en) Solid-state image pickup device
EP0940628A3 (en) Interior light with a wing structure
JP2517483B2 (en) Indicator light mounting device
JPS60262370A (en) Lamp supporting device of light source
JP2000321507A (en) Light source device
JPH01217801A (en) Device for installing light source lamp

Legal Events

Date Code Title Description
AS Assignment

Owner name: ASAHI KOGAKU KOGYO KABUSHIKI KAISHA, NO. 36-9, MAE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:YAMAKA, SHOICHI;USAMI, JUNJI;REEL/FRAME:005582/0926

Effective date: 19910111

STCF Information on status: patent grant

Free format text: PATENTED CASE

CC Certificate of correction
FPAY Fee payment

Year of fee payment: 4

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12